深部开采矿井通风系统降温效果分析

摘要

The paper aims to simulate deep mining in mine of high temperature environment, analysis air cooling effect of the different parameters of the mechanical ventilation, to determine the best supply air parameters, to provide the theory basis for design of the deep mining of the mine ventilation system. Shaft wall temperature is according to the changes of geothermal characteristics and using UDF programming of fluent, using numerical simulation software Fluent,determine the temperature distribution of natural ventilation in the mine,wind speed size;analysis the cooling effect of the underground of the mine deep mining adopting mechanical ventilation in different supply air speed, different air supply temperature, to determine the best supply air parameters. When deep mining wells supply air winds of 4 m/s,supply air temperature for 15 t in the level of roadway temperature can drop to 28 ℃ ,meet mine safety regulations sets. The ultimate load is that deep mining the mining depth for 1 000 m when used mechanical ventilation shaft can achieve high temperature in the control of the environment. For more complicated mine, can consider to use water mist and mechanical ventilation combined cooling method, also can realize dust comprehensive prevention and control.%目的 模拟深部开采矿井井下高温环境,分析机械通风不同送风参数下的降温效果,确定出最佳送风参数,为深部开采矿井通风系统的设计提供理论依据.方法 利用Fluent软件进行数值模拟,竖井壁面温度根据地温变化特点利用UDF编程确定,测定自然通风时矿井内的温度分布、风速大小,分析在深部开采矿井机械通风不同的送风速度、送风温度下,井下的降温效果,确定出最佳送风参数.结果 当深采矿井送风风速为4 m/s,送风温度为15℃时水平巷道内的温度能够降到28℃,满足矿山安全规程规定.结论 深采矿山开采深度为1000m,巷道长度为60 m时采用竖井机械通风能够实现井下高温环境的有效控制.对更为复杂的矿井,可以考虑采用细水雾和机械通风联合降温的方法,还可实现粉尘的综合防治.